摘要
本文以轻隔间墙体系统为研究对象,梳理现行规范与实际使用场景的差异,指出目前墙体耐火极限检测均以完整墙体作为试样来进行试验,但实际建筑中的墙体大多需安装插座接线盒等装置,对原本完整的墙体造成一定程度的破坏。本研究对安装接线盒的轻隔间墙体系统进行建筑构件耐火极限试验,研究表明:背火面安装接线盒对于墙体耐火性能影响较大,耐火极限为90min的墙体在距顶部500mm处安装PVC接线盒后,耐火极限为73min,减少17min;受火面安装接线盒对于墙体的耐火极限影响相对较小;接线盒安装位置距地面越高,在火场作用下温度上升越快,越容易发生破坏,从而影响墙体的耐火极限;PVC材质接线盒比不锈钢材质接线盒更容易熔化破坏,对墙体构造产生影响,降低墙体的耐火极限。研究成果系统性的展示了接线盒安装在墙体后对其耐火极限的影响,为相关研究的拓展及补强措施的研究提供参考。
This paper takes the light steel keel gypsum board partition wall system as research object,sorts out the differences between current standards and actual using scenes,and points out that the current fire resistance detection of walls is based on intact walls as samples for testing.But most walls require the installation of sockets and junction boxes,causing damages to the original walls to some extent.In this study,the fire resistance test of the building components is carried out on the light steel keel gypsum board partition wall body installed with junction boxes.The research shows that back fire surface installed junction box has a great impact on the fire resistance performance of the walls:for the wall with 90min fire resistance installed with PVC junction box in 500mm from the top,fire resistance shortened to 73min,reduced by 17min;junction box installed in the fire surface side of the wall has little effects on fire resistance;the higher the junction box installation position is from the ground,the larger the damage to fire resistance performance of the wall;PVC junction box has larger negative impact compared with stainless steel junction box to the fire resistance performance of the wall.The research results systematically illustrate the influence of junction box installation on fire resistance of walls,and provide references for the expansion of relevant research and the study of reinforcement measures.
作者
王一诺
张丽丽
刘庆
刘海静
曹健
Wang Yinuo;Zhang Lili;Liu Qing;Liu Haijing;Cao Jian(Beijing Polytechnic College,Beijing 100042,China;State Key Laboratory of Building Safety and Environment,China Academy of Building Research,Beijing 100013,China;BBMG Energy Saving Material&Technology(Dachang)Co.Ltd,Sanhe 065300,China)
出处
《建筑科学》
CSCD
北大核心
2024年第1期59-65,共7页
Building Science
关键词
轻隔间墙体
接线盒
耐火极限
light steel keel gypsum board partition wall
junction box
fire resistance
作者简介
王一诺(1990-),男,博士,讲师。[联系方式]760147354@qq.com。
